Because the Americas had to travel some 3000 miles from Europe and Africa in about 4500 years to get to their present position.
And so it obviously didn't happen that way.
And actually, your time-frame is less than that since we have been able to observe the planet reliably for at least a thousand years and no CPT has ever been noticed.
There are problems with that long time in lots of other ways though, and you guys who so blithely conjure all those millions of years don't bother with trying to understand it all from the point of view of the God who made you and made it all.
So, you're not going to tell us how old ages are problems in 'lots of other ways'? You realize that you just made an unsupported assertion?